2 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * SPDX-License-Identifier: MIT
7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 * this software and associated documentation files (the "Software"), to deal in
9 * the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 * the Software, and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * https://www.FreeRTOS.org
25 * https://github.com/FreeRTOS
39 /* Hardware specifics. */
42 /*-----------------------------------------------------------
43 * Port specific definitions.
45 * The settings in this file configure FreeRTOS correctly for the
46 * given hardware and compiler.
48 * These settings should not be altered.
49 *-----------------------------------------------------------
52 /* Type definitions - these are a bit legacy and not really used now, other than
53 * portSTACK_TYPE and portBASE_TYPE. */
55 #define portFLOAT float
56 #define portDOUBLE double
58 #define portSHORT short
59 #define portSTACK_TYPE uint32_t
60 #define portBASE_TYPE long
62 typedef portSTACK_TYPE StackType_t;
63 typedef long BaseType_t;
64 typedef unsigned long UBaseType_t;
66 #if ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_16_BITS )
67 typedef uint16_t TickType_t;
68 #define portMAX_DELAY ( TickType_t ) 0xffff
69 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
70 typedef uint32_t TickType_t;
71 #define portMAX_DELAY ( TickType_t ) 0xffffffffUL
73 /* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
74 * not need to be guarded with a critical section. */
75 #define portTICK_TYPE_IS_ATOMIC 1
77 #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
79 /*-----------------------------------------------------------*/
81 /* Hardware specifics. */
82 #define portBYTE_ALIGNMENT 8 /* Could make four, according to manual. */
83 #define portSTACK_GROWTH -1
84 #define portTICK_PERIOD_MS ( ( TickType_t ) 1000 / configTICK_RATE_HZ )
85 #define portNOP() nop()
88 #pragma inline_asm vPortYield
89 static void vPortYield( void )
91 /* Save clobbered register - may not actually be necessary if inline asm
92 * functions are considered to use the same rules as function calls by the
98 /* Read back to ensure the value is taken before proceeding. */
100 /* Restore clobbered register to its previous value. */
103 #define portYIELD() vPortYield()
104 #define portYIELD_FROM_ISR( x ) do { if( x != pdFALSE ) portYIELD( ); } while( 0 )
106 /* These macros should not be called directly, but through the
107 * taskENTER_CRITICAL() and taskEXIT_CRITICAL() macros. An extra check is
108 * performed if configASSERT() is defined to ensure an assertion handler does not
109 * inadvertently attempt to lower the IPL when the call to assert was triggered
110 * because the IPL value was found to be above configMAX_SYSCALL_INTERRUPT_PRIORITY
111 * when an ISR safe FreeRTOS API function was executed. ISR safe FreeRTOS API
112 * functions are those that end in FromISR. FreeRTOS maintains a separate
113 * interrupt API to ensure API function and interrupt entry is as fast and as
114 * simple as possible. */
115 #define portENABLE_INTERRUPTS() set_ipl( ( long ) 0 )
117 #define portASSERT_IF_INTERRUPT_PRIORITY_INVALID() configASSERT( ( get_ipl() <= configMAX_SYSCALL_INTERRUPT_PRIORITY ) )
118 #define portDISABLE_INTERRUPTS() if( get_ipl() < configMAX_SYSCALL_INTERRUPT_PRIORITY ) set_ipl( ( long ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
120 #define portDISABLE_INTERRUPTS() set_ipl( ( long ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
123 /* Critical nesting counts are stored in the TCB. */
124 #define portCRITICAL_NESTING_IN_TCB ( 1 )
126 /* The critical nesting functions defined within tasks.c. */
127 extern void vTaskEnterCritical( void );
128 extern void vTaskExitCritical( void );
129 #define portENTER_CRITICAL() vTaskEnterCritical()
130 #define portEXIT_CRITICAL() vTaskExitCritical()
132 /* As this port allows interrupt nesting... */
133 #define portSET_INTERRUPT_MASK_FROM_ISR() ( UBaseType_t ) get_ipl(); set_ipl( ( long ) configMAX_SYSCALL_INTERRUPT_PRIORITY )
134 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus ) set_ipl( ( long ) uxSavedInterruptStatus )
136 /*-----------------------------------------------------------*/
138 /* Task function macros as described on the FreeRTOS.org WEB site. */
139 #define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void * pvParameters )
140 #define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void * pvParameters )
148 #endif /* PORTMACRO_H */